Removed some unnecessary friendships

git-svn-id: svn+ssh://svn.code.sf.net/p/supertuxkart/code/main/trunk@5283 178a84e3-b1eb-0310-8ba1-8eac791a3b58

src/guiengine/widget.hpp

@@ -115,11 +115,8 @@ namespace GUIEngine
         unsigned int m_magic_number;
 
         friend class EventHandler;
-        friend class RibbonWidget;
         friend class Screen;
-        friend class SpinnerWidget;
         friend class Skin;
-        friend class DynamicRibbonWidget;
         
         /** When true, this widget shall use a bigger and more colourful font */
         bool m_title_font;